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RA6999-AL Forward Mode Transformer

for Maxim MAX17599 PWM Controller

RoHS compliant
  • Developed for use with Maxim MAX17599 Active Clamp Current-Mode PWM Controller.
  • Designed for forward topology operating at 250 kHz with an input range of 18 – 36 V.
  • For a planar tranformer with a smaller footprint and lower profile, see RA6998-BL
Buy Now:
Count Unit price
1 $3.95
175 $3.16
700 $2.75
1400 $2.14
2800 $1.84
5000 $1.69

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
Request a Sample:

Typical Application

Works with Maxim MAX17599

Input Voltage Output 1 Power
18 V 36 V 12 V , 3.3 A 40 W

Specifications

Electrical specifications at 25°C.

Part number 2 Inductance
min (µH) 3
DCR max (mΩ) 4 Leakage
Inductance
max (µH) 5
Turns Ratio Isolation
Voltage (Vrms) 6
Pri Sec Gate Pri : Sec : Gate
RA6999-AL_ 70 20.5 29.5 36.4 0.35 1 : 1.125 : 0.375 1500
Notes
  1. Output is of the secondary winding. Gate winding output is 4 V, 0.25 A.
  2. When ordering, please specify packaging code: e.g. RA6999-ALD
  3. Inductance is for the primary, measured at 250 kHz, 0.1 Vrms, 0 Adc.
  4. DCR for the secondary is measured with the windings connected in parallel. DCR at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
  5. Leakage inductance is for the primary winding with the secondary windings shorted.
  6. 1500 Vrms isolation from primary to secondary and gate.

Termination:

  • RoHS-compliant  260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze.

Packaging:

  • D = 13" machine-ready reel
    EIA 481 embossed plastic tape (175 parts per full reel).
  • B = Less than full reel
    In tape, but not machine-ready. To have a leader and trailer added ($25 charge), use code letter D instead.
Environmental
Environmental:
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: –40°C to +125°C
Tape and reel packaging: –40°C to +80°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF):
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Schematics

ra6999s.gif

Physical characteristics

ra6999d.gif

dims_inches_mm.gif

Tape and Reel specification

tapereel_pl.gif

 
Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T part_or_c.gif
175 330 100 13 50,4 44,4 44 28 4 2 11.9 0,4

General specification

Core Material:
Ferrite
Weight:
10.5 g
Packaging:
175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 28 mm pocket spacing, 11.9 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested with pure water or alcohol only. More info

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